SHED repair critical-size calvarial defects in mice.
OBJECTIVE
Stem cells from human exfoliated deciduous teeth (SHED) are a population of highly proliferative postnatal stem cells capable of differentiating into odontoblasts, adipocytes, neural cells, and osteo-inductive cells. To examine whether SHED-mediated bone regeneration can be utilized for therapeutic purposes, we used SHED to repair critical-size calvarial defects in immunocompromised mice.


METHODS
We generated calvarial defects and transplanted SHED with hydroxyapatite/tricalcium phosphate as a carrier into the defect areas.


RESULTS
SHED were able to repair the defects with substantial bone formation. Interestingly, SHED-mediated osteogenesis failed to recruit hematopoietic marrow elements that are commonly seen in bone marrow mesenchymal stem cell-generated bone. Furthermore, SHED were found to co-express mesenchymal stem cell marker, CC9/MUC18/CD146, with an array of growth factor receptors such as transforming growth factor beta receptor I and II, fibroblast growth factor receptor I and III, and vascular endothelial growth factor receptor I, implying their comprehensive differentiation potential.


CONCLUSIONS
Our data indicate that SHED, derived from neural crest cells, may select unique mechanisms to exert osteogenesis. SHED might be a suitable resource for orofacial bone regeneration.
Seo
B M
BM
Department of Oral and Maxillofacial Surgery, College of Dentistry, Seoul National University, Seoul, Korea.
Sonoyama
W
W
Yamaza
T
T
Coppe
C
C
Kikuiri
T
T
Akiyama
K
K
Lee
J S
JS
Shi
S
S
D020341:Absorbable Implants; D000818:Animals; D001672:Biocompatible Materials; D001843:Bone Cements; D001861:Bone Regeneration / Q000502:physiology*; D018786:Bone Substitutes; D002130:Calcium Phosphates; D002478:Cells, Cultured; D017886:Durapatite; D006801:Humans; D051379:Mice; D008815:Mice, Inbred Strains; D039902:Multipotent Stem Cells / Q000166:cytology* / Q000637:transplantation; D009432:Neural Crest / Q000166:cytology; D016348:Osseointegration / Q000502:physiology*; D010006:Osteoblasts / Q000166:cytology* / Q000502:physiology; D010012:Osteogenesis / Q000502:physiology*; D012886:Skull / Q000601:surgery; D033581:Stem Cell Transplantation / Q000379:methods*; D014094:Tooth, Deciduous / Q000166:cytology
D001672:Biocompatible Materials; D001843:Bone Cements; D018786:Bone Substitutes; D002130:Calcium Phosphates; D017886:Durapatite; C018392:tricalcium phosphate